135505493721539 has 2 divisors, whose sum is σ = 135505493721540. Its totient is φ = 135505493721538.

The previous prime is 135505493721527. The next prime is 135505493721547. The reversal of 135505493721539 is 935127394505531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135505493721539 - 2³⁶ = 135436774244803 is a prime.

It is not a weakly prime, because it can be changed into another prime (135505493724539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67752746860769 + 67752746860770.

It is an arithmetic number, because the mean of its divisors is an integer number (67752746860770).

Almost surely, 2^{135505493721539} is an apocalyptic number.

135505493721539 is a deficient number, since it is larger than the sum of its proper divisors (1).

135505493721539 is an equidigital number, since it uses as much as digits as its factorization.

135505493721539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545000, while the sum is 62.

The spelling of 135505493721539 in words is "one hundred thirty-five trillion, five hundred five billion, four hundred ninety-three million, seven hundred twenty-one thousand, five hundred thirty-nine".